call by address /reference example 1

CALL BY ADDRESS/REFERENCE EXAMPLE 1:

void swap(int*a,int *b)

{

int t;

t=*a;

*a=*b;

*b=t;

}

void main()

{

    int a=10,b=20;

    printf("Before swapping : %d,%d\n",a,b);

    swap(&a,&b);

    printf("After swapping : %d,%d\n",a,b);

}

OUTPUT

Before swapping 10,20

After swapping 20,10